Pump



Oct. 27, 1936.

` w. N. Hulv-F PUMP Filed Oct. 8, 1935 2 Sheets-She'et 1 Invenlor W. N. HUFF PUMP l Oct 27, 1936.

Filed oct. 8, 1935 2 Sheets-Sheet 2 JI! d Q M w V al1 Patented oct. 27, 193e f PATENT OFFICE PUMP Walter N. Hui?, Harwood, Tex.,vassignor to Huff Rodiess Pump Company Application October 8,1935, Serial No. 44,114

1 Claim.

The present invention relates to new and useful improvements in pumps of the valved recprocating piston type and has for its primary object to provide, in a manner as hereinafter set forth, a novel construction and arrangement whereby the usual rod extending from the piston to the surface of the ground is dispensed with.

Another important object of the invention is to provide a pump of the aforementioned character wherein the fluid being elevated is utilized for actuating the piston in one direction.A

Other objects of the invention are to provide a pump of the character described which will be comparatively simple in construction, strong,

durable, reliable in operation, compact, and light vin weight.

All of the foregoing and still further objects and advantages of the invention will become apparent from a study of thefollowing specification, taken in connection with the accompanying drawings4 wherein like characters of reference designate corresponding parts throughout the several views, and wherein:-

fil

Figure 1 is a vertical sectional view through a l pump constructed in accordance with the present invention.

Figure 2 is a fragmentary view in vertical sectio'n', taken substantially on the line 2-2 of Figure 1.

Figure 3 is a fragmentary view in vertical section, taken substantially on the line 3-3 of Figure 1.

Figure 4 is a fragmentary view in vertical section, taken l substantially on the line 4-4 of 35 Figure 1.

substantially on the line 5-'5 of Figure 3.

Referring now tothe drawings in detail, it will be seen that the 'embodiment of the invention which has been illustrated comprisesan upper cylinder I with which a discharge pipe 2 communicates at an intermediate point. Slidable in the cylinder I isa piston 3 which is mounted on the lower end of a rod 4, said rod 4 extending Figure 5 is a 'horizontal sectional view, taken reciprocation therein a piston 9. TheA piston 9 is threadedly connected by a cage I t the lower end of a tubular rod II which extends upwardly through the intermediate cylinder 'I into the tube 6. A suitable check valve I2 in the cage I Il permits upward but not downward iiow of fluid through the piston 9. Fixed on an upper. portion of the tubular r'od I I and operable in the` intermediate cylinder 1 is a piston I3. Of course, -the tubing 6 and the tubular rod II may be of as many sections and of any length desired.

As illustrated to advantage in Figure 3 of the drawings, a cage I4 is threadedly mounted on the upper end of the tubular rod I I and operable inv said cage I4 is a suitable check valve I5 which permits the fluid to flow into the tubing 6 from said tubular rod II but which prevents the return ow of said fluid. Threadedly engaged .in

- the cage I4 and rising therefrom is a stem IB having mounted on its upper end washers or the like I'I. A coil spring I8 encircles the stem I6 and has its upper end engaged with the washers I1 and its lower end engaged with the lower end of the tubing 6.

In operation, the pump is normally lled with uid up to the piston 3. When the piston4 3 is 'forced downwardly, the fluid between said piston 3 and the piston I3 forces the latter, together with the piston 9, downwardly, in a manner to compress the spring I8, during which stroke the fluid below said piston 9 passes upwardly therethrough past the check valve I2. Then, when pressure on the piston 3 is removed, the coil spring I8 expands, raising the pistons I3 and 9 and causing the fluid above the piston 9 to be elevated through the tubular rod I I, through the tubing 6 and into the upper cylinder I from which it is discharged through the pipe 2. Of course, this operation is then repeated, the piston 3 again being forced downwardly to lower piston 9 against the tension of the spring I8,` etc. As the piston 3 moves downwardly the discharge pipe 2 is shut oif from communication with the lower portion of the cylinder I and the tubing 6 thereby.

It is believed that the many advantages of a pump constructed in accordance with the present invention will be readily understood, and although a preferred embodiment of thedevice is as illustrated and described, it is to be understood that changes in the details of construction and in the combination and arrangement vof parts may be resorted to which will lfall within the scope of the invention as claimed. x

`What ,is claimed ist- A pump comprising an upper cylinder having a discharge, a piston operable in said upper cylinder,

` means for actuating said piston, a, tube connected to said upper cylinder and depending therefrom, an intermediate cylinder connected with the lower end of the tube andcommunicating therewith, a

comparatively large lower cylinder connected to the lower end of the intermediate cylinder and communicating therewith, a valved piston operable in the lower cylinder, a tubular stem connected to the second-named piston and extending upwardly therefrom into the intermediate cylinder, said tubular stem communicating, at its lower end, vwith the lower cylinder and at its upper end with the tube, a piston xed on the tubular stem and operable in the intermediate cylinder, the 'iirst-named piston constituting means for forcing the third and second-named pistons downwardly through the medium of the uid between said rst and said third named pistons, a check valve for preventing downward i'low of the fluid through the tubular rod, a stem rising from the vupper end of said tubular rod, and a coil spring encircling said stem and operatively connected thereto for elevating the second and third named pistons.

WALTER N. HUFF. 

